/**
 * Created by dllo on 18/3/31.
 */
public class Test08 {
    public static void main(String[] args) {
        int a = 10000;
        int day = 0;
        while (a / 2 != 0) {
            day++;
            a = a / 2;
        }
        System.out.println(day+1);
    }
}
